/Engine/Source/Editor/MaterialEditor/Public/IMaterialEditor.h
Public interface to Material Editor
class IMaterialEditor : public [FWorkflowCentricApplication](API\Editor\UnrealEd\WorkflowOrientedApp\FWorkflowCentricApplication), public [IHasMenuExtensibility](API\Editor\UnrealEd\Toolkits\IHasMenuExtensibility), public [IHasToolBarExtensibility](API\Editor\UnrealEd\Toolkits\IHasToolBarExtensibility)